Serena and Venus take fourth consecutive grand slam

Sisters Serena and Venus completed a 'Williams slam' of four consecutive grand slam doubles titles when they beat Kveta Peschke and Katarina Srebotnik 6-2, 6-3 on Friday to win the French Open.

The Americans wrapped up victory in 73 minutes to win their 12th grand slam title together, adding the trophy to the ones they won at Wimbledon and the U.S. Open last year and at the Australian Open in January.